------------[ cut here ]------------
WARNING: kernel/signal.c:2174 at do_notify_parent+0x37c/0x384 kernel/signal.c:2174, CPU#1: syz.1.154/4200
Modules linked in:
Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 1 UID: 0 PID: 4200 Comm: syz.1.154 Not tainted syzkaller #0 PREEMPT 
Hardware name: ARM-Versatile Express
Call trace: 
[<80201a14>] (dump_backtrace) from [<80201b08>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:257)
 r7:82a1e6f8 r6:00000000 r5:8231c0d0 r4:00000001
[<80201af0>] (show_stack) from [<8021e320>] (__dump_stack lib/dump_stack.c:94 [inline])
[<80201af0>] (show_stack) from [<8021e320>] (dump_stack_lvl+0x5c/0x70 lib/dump_stack.c:120)
[<8021e2c4>] (dump_stack_lvl) from [<8021e34c>] (dump_stack+0x18/0x1c lib/dump_stack.c:129)
 r7:82a1e6f8 r6:00000000 r5:846dbd40 r4:82c7bd3c
[<8021e334>] (dump_stack) from [<8020260c>] (vpanic+0x114/0x320 kernel/panic.c:650)
[<802024f8>] (vpanic) from [<8020284c>] (trace_suspend_resume+0x0/0x104 kernel/panic.c:787)
 r7:80265f80
[<80202818>] (panic) from [<802506a8>] (check_panic_on_warn kernel/panic.c:524 [inline])
[<80202818>] (panic) from [<802506a8>] (get_taint+0x0/0x1c kernel/panic.c:519)
 r3:82a0b544 r2:00000001 r1:82302bb8 r0:8230a498
[<80250630>] (check_panic_on_warn) from [<80250824>] (__warn+0x98/0x1ac kernel/panic.c:1103)
[<8025078c>] (__warn) from [<80250ab0>] (warn_slowpath_fmt+0x178/0x1f4 kernel/panic.c:1130)
 r8:00000009 r7:8230b694 r6:df9c9de4 r5:846dbd40 r4:00000000
[<8025093c>] (warn_slowpath_fmt) from [<80265f80>] (do_notify_parent+0x37c/0x384 kernel/signal.c:2174)
 r10:846dc434 r9:00000000 r8:df9c9e90 r7:846dc610 r6:00000080 r5:846dbd40
 r4:846dbd40
[<80265c04>] (do_notify_parent) from [<80257a90>] (exit_notify kernel/exit.c:757 [inline])
[<80265c04>] (do_notify_parent) from [<80257a90>] (do_exit+0x798/0xae4 kernel/exit.c:987)
 r8:df9c9e90 r7:846dc610 r6:833e7880 r5:846dbd40 r4:846ebd40
[<802572f8>] (do_exit) from [<80257fa8>] (do_group_exit+0x40/0x8c kernel/exit.c:1117)
 r7:00112104
[<80257f68>] (do_group_exit) from [<80268fd0>] (get_signal+0xa8c/0xab4 kernel/signal.c:3037)
 r7:00112104 r4:846dbd40
[<80268544>] (get_signal) from [<8022a74c>] (do_signal arch/arm/kernel/signal.c:579 [inline])
[<80268544>] (get_signal) from [<8022a74c>] (do_work_pending+0x220/0x4e8 arch/arm/kernel/signal.c:619)
 r10:00000109 r9:00112108 r8:fffffdfc r7:00112104 r6:ffffffff r5:df9c9fb0
 r4:846dbd40
[<8022a52c>] (do_work_pending) from [<80200088>] (slow_work_pending+0xc/0x24)
Exception stack(0xdf9c9fb0 to 0xdf9c9ff8)
9fa0:                                     00000000 00000000 76fdfdf0 76fdfdfc
9fc0: 00000000 00000000 00000000 00000109 003462d8 00000000 00000001 76fe00dc
9fe0: 76fdfdb8 76fdfda4 0010b524 00112104 60000010 00000000
 r10:00000109 r9:846dbd40 r8:8020029c r7:00000109 r6:00000000 r5:00000000
 r4:00000000
Rebooting in 86400 seconds..